System, device and method for realizing operation protection of logging winch

Abstract

The invention discloses a system, a device and a method for realizing the operation protection of a logging winch. The system comprises a depth monitoring system and a winch operation control device, wherein the depth monitoring system is used for comparing a detected instant well depth with a preset well depth and outputting an alarm signal to the winch operation control device if a comparison result is less than a threshold value; and the winch operation control device is used for controlling the logging winch to operate at a low speed by a preset low-speed control signal according to the input alarm signal. In the invention, correlation is established between a power system of the existing logging winch and the depth monitoring system, so that the automatic speed reduction protection of the operation of the winch and the safety protection of an instrument carried on the logging winch are realized. Moreover, part properties of a two-way variable displacement pump can be controlled according to the design requirement and an electro-hydraulic proportion, and a lifting or descending operation speed after the speed of the winch is automatically reduced is set in a certain range.

Description

technical field [0001] The invention relates to the drawworks operation control technology of the well logging system, in particular to a system, device and method for realizing the operation protection of the well logging drawworks. Background technique [0002] Well logging drawworks is a comprehensive equipment for midway testing and well testing in oil fields. The drum is driven by the power system to realize the lifting or lowering of the cable and the instruments and equipment it carries. At present, the known well logging drawworks include a power system and a depth monitoring system. [0003] The power system consists of a hydraulic system and its control circuit. [0004] Such as figure 1 As shown, the hydraulic principle of the hydraulic system in the prior art power system is represented. The volume speed regulation closed loop in this power system is controlled by electro-hydraulic proportional control bidirectional variable pump, bidirectional motor (such as ...

AI Technical Summary

Problems solved by technology

[0007] However, there is no correlation between the power system and the depth monitoring system in the existing logging winch. And when a light alarm is issued, the power system cannot realize the automatic low-speed operation of the winch according to the alarm of the depth monitoring system, and cannot realize the automatic protection of the winch operation and the safety protection of the carried instruments

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